Effect of rubber compounding agent on adhesion strength between rubber and heat-assisted plasma-treated polytetrafluoroethylene (PTFE)

Vulcanization of chlorinated polyethylene / chloroprene rubber compounds at lower temperatures in the presence of reactive silanes

“…In XPS analysis, sometimes it is not possible to specify the atom which electrons emitted from because of overlapping of characteristic peak points. This is a drawback and avoids to accurately define functional groups on the material surface 58,59 . It is seen in Figure 10 that there is only one specific peak representing one bonding energy for all the regions analyzed.…”

“…This is a drawback and avoids to accurately define functional groups on the material surface. 58,59 It is seen in Figure 10 that there is only one specific peak representing one bonding energy for all the regions analyzed. These spectrums allow to easily detect the functional groups by correlating with their bonding energies found in literature.…”

Influence of air contamination during heat-assisted plasma treatment on adhesion properties of polytetrafluoroethylene (PTFE)

“…The applied power density for plasma generation was 19.1 W cm À2 , and the plasma treatment was carried out for 600 s according to the protocol reported previously. 29 During the treatment, the surface temperature of each PTFE sample during HAP treatment was measured using a digital radiation thermometer (FT-H40K and FT-50A, Keyence, Japan) to conrm that the maximum surface temperature remained above 200 C.…”

“…The samples were prepared for the adhesion test between PTFE and IIR as previously reported. 29 Briey, each HAP-treated PTFE sample was placed on an unvulcanized IIR sheet within a mold without an adhesive. Then, the PTFE/IIR assembly was thermally compressed under 10 MPa at 180 C for 10 min using a hot-pressing machine (AH-2003, AS-ONE, Japan).…”

Comparison between adhesion properties of adhesive bonding and adhesive-free adhesion for heat-assisted plasma-treated polytetrafluoroethylene (PTFE)

“…Conversely, strong adhesive-free adhesion between PTFE and other types of materials has rarely been achieved using combinations of other than plasma treatment and graft polymerisation. In recent years, researchers have achieved extremely strong adhesion of PTFE/isobutyleneisoprene rubber (IIR) and PTFE/natural rubber without using either an adhesive or a grafting agent [28][29][30]. These authors reported that the effect of heating during plasma treatment improved the adhesion property of PTFE, and some of them named the method heat-assisted plasma treatment.…”